The hospital expects to treat a total of about 20 of the bombing victims.

Highlights of the new $225 million facility include more than three times the therapy space available at the hospital’s previous location on Nashua Street in Boston, an aquatics center with two state-of-the-art therapy pools, and a pediatric unit that will offer the advanced therapies and care for children.

Dr. Nasser Karamouz, a psychiatrist at Spaulding, said survivors of the Boston Marathon bombings face more than physical recoveries. He said runners who suffered severe leg injuries face a particularly hard challenge after training for months to compete in the marathon. “There’s no preparation for that,” he said.

Roseann Sdoia, who lost part of her right leg near the marathon finish line, was one of the bombing survivors moved Saturday. “It gets easier and easier,” she said of her recovery.